JPS6355486A - Detecting device for support of wall - Google Patents

Abstract

PURPOSE:To exactly and easily detect the center position of a support by providing a center measuring means for measuring the center position of the support, and a display means for displaying a fact that the support is positioned in the center position, based on an output of the center measuring means. CONSTITUTION:A center measuring means consists of an encoder 41 (41a, 41b) for outputting a pulse, when an electrode plate 11 is moved along the surface of a wall panel, a direction discriminating circuit 42 for detecting a moving direction, based on an output of the encoder 41, a counter 43 for counting an output pulse of the encoder 41, in a period in which a display lamp 27 is lighted, a peak detecting circuit 44, and a voltage dividing circuit 45. Also, a display means consists of a center displaying circuit 46 for lighting a center display lamp 58, when output values of the circuits 43, 45 coincide. In this state, cord wheels 51a, 51b of the encoder 41 are moved until the lamp 27 is lighted from its turn-off state and turned off again, and a value corresponding to width of a support is held 44. Subsequently, when a casing is moved from its original position, the lamp 58 is lighted, and the center position of the support is shown.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to g! In order to attach wall panels such as plywood or gypsum board that form the wall (including the ceiling), supports such as rims, studs, and edges installed at the back of the wall panel are detected from the surface side of the wall panel. The present invention relates to a support pillar detection device.

[Background technology J Generally, when walls (including ceilings) are formed of wall panels such as plywood or gypsum board, in order to attach a clock or frame to the wall, or to attach a unit to the ceiling or wall, To attach the panel, it is necessary to locate the supports (studs, trusses, sills, etc.) provided on the back of the wall panel and insert nails or hooks into the supports. However, since the surface of the wall panel is generally finished by pasting a decorative sheet or painting, it is difficult to locate the support columns visually.

Therefore, a method is generally used in which the position of a support post is detected by tapping the surface of a wall panel with a hammer or the like and using the fact that the sound produced changes depending on the presence or absence of the support support. However, since the sound of gypsum board does not change much depending on the presence or absence of supports, it is difficult for only an experienced person to detect the supports using this method.

U.S. Patent No. 409 solves this problem.
A stud sensor disclosed in No. 9118 is known. This uses the fact that the dielectric constant changes depending on the presence or absence of a support at the back of the wall panel, and detects the support installed at the back of the wall panel based on changes in capacitance (stray capacitance). . That is, as shown in FIG. 18, a device equipped with an electrode plate 11 on one side of the casing 3 is moved along the surface of the wall panel 1 as shown by the arrow in FIG.
Changes in capacitance are detected by utilizing the fact that the electric field generated in the electrode plate 11 as shown in FIG. 16 changes with the change in dielectric constant. Here, the capacitance is the 17th
As shown in the figure, it changes so that it becomes maximum at the center position of the support column 2. Based on this principle, in the above-mentioned US patent, the display element 5 such as a light emitting diode is set to light up (indicated by a black circle in FIG. 16) when the capacitance is less than a predetermined value. Therefore, in order to find the center position of the support column 2, the lighting start position and the lighting end position of the display element 5 must be
All you have to do is mark the dots and then measure the intermediate position of the dots visually or with a ruler. However, there is a problem that the visual method (1) does not allow accurate positioning, and the method of measuring using a ruler is time-consuming.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its object is to automatically detect the center position of a support provided at the back of a wall panel. An object of the present invention is to provide a wall support detection device.

[Disclosure of the Invention 1 (Example 1) As shown in FIG. 1, basically, an electrode plate 11 is placed facing the surface of a wall panel 1, and the capacitance detected by the electrode plate 11 is detected. A display unit 13 equipped with a capacitance detection unit 12, a light emitting diode that lights up when the capacitance is greater than or equal to a predetermined value, a center measuring means for measuring the center position of the support post 2, and a center measurement unit that measures the center position of the support support by the center measurement means. and display means for indicating that the position has been detected.

The capacitance detection unit 12 includes a pair of monostable multivibrators 21 and 22, and one monostable multivibrator 22.
a reference time constant determining circuit 23 that sets a time constant of
and an integrating circuit 25 that integrates the output pulse of the time difference detection circuit 24. One end of the electrode plate 11 is connected to a resistor R connected to a DC power source B via a switch SW, and the other end is connected to the resistor R, and the time constant circuit of the monostable multipipe lake 21 is formed by the electrode plate 11 and the resistor R. It is configured. Therefore, the output of the monostable multivibrator 21 is a pulse (FIG. 2 (C)) with a pulse width corresponding to the time constant (FIG. 2 (a)) due to the capacitance detected by the electrode plate 11 and the resistor R8. It is obtained as follows. Furthermore, the monostable multivibrator 22 has a reference time constant determining circuit 23.
A pulse (FIG. 2(d)) having a pulse width corresponding to a preset time constant (FIG. 2(b)) is output.

Here, the output of the monostable multivibrator 21 is a positive logic, and the output pulse of the monostable multivibrator 22 is a negative logic. Furthermore, the fall of the output of the monostable multipipe rake 21 is set to 9 and the rise of the output of the monostable multivibrator 22 is set to occur simultaneously. The outputs of both vehicle stabilizing multivibrators 21 and 22 are input to the time difference detection circuit 24, and in the time difference detection circuit 24, the output from the monostable multivibrator 22 falls until the output rises from the monostable multipipe rake 21. A pulse (FIG. 2(e)) with a pulse width corresponding to the time difference of is output. The output of the time difference detection circuit 24 is integrated by the integration circuit 25 and becomes an output of a DC voltage proportional to the pulse width (Fig. 2(f)).If the capacitance detected by the electrode plate 11 is large, Since the time required for the output pulse of the monostable multivibrator 21 to rise becomes longer, the pulse width of the output pulse of the time difference detection circuit 24 becomes larger, and as a result, the output voltage (2) of the integrating circuit 25 becomes larger. In other words, the integrating circuit 25
The output voltage V is larger at the position where the support 2 is present than at the position where the support 2 is dark. By the way, the reference time constant determination circuit 23 is set to a time constant corresponding to the time constant due to the capacitance of the wall panel 1 and the resistance R1 detected by the electrode plate 11 in a place where the support column 2 is not present. therefore,
In a place where there is no pillar 2, the output voltage of the integrating circuit 25 is approximately 0.
Therefore, an appropriately large output voltage V can be obtained only at the location where the pillar 2 is present.

Note that when the switch SW is turned on, the reference time constant determination circuit 24 is automatically set to the same time constant as the time constant of the electrode plate 11 and the resistor R5 at that time, and when used without the pillar 2. The switch SW is turned on while the device is brought into contact with the surface of the wall panel 1 at a place where the device is considered to be in contact with the surface of the wall panel 1, and then the device is moved to detect the support column 2.

The display section 30 includes a display circuit 26 having an appropriate threshold value so that the display lamp 27 lights up when the output voltage (2) of the integrating circuit 25 exceeds a predetermined value.

The center measuring means is based on optical encoders 41a and 41b that output a number of pulses corresponding to the moving distance when the electrode plate 11 is moved along the surface of the wall panel 1, and the outputs of the encoders 41a and 41b. a direction discrimination circuit 42 that detects the direction of movement; a counter 43 that counts the number of output pulses from the encoders 41a and 41b during the period when the indicator lamp 27 is lit; and a peak detection circuit that maintains the maximum value of the output value of the counter 43. circuit 44 and peak detection circuit 4
．． The display means includes a center display circuit that lights up a center display lamp 58 when the output value of the voltage divider circuit 45 and the output value of the counter 43 match. It consists of 46 pieces.

The optical encoders 41a and 41b are shown in FIGS.
As shown in the figure, a code wheel 5 is formed into a disk shape and has a large number of slits 53 formed at equal intervals in the circumferential direction.
1a, 51b, and photointerrupters 52a, 52b in which a light emitting part and a light receiving part are arranged oppositely, the photointerrupter 52a,
A code wheel 51a is placed between the light emitting part and the light receiving part of 52b.
, 51b are inserted. Encoder 41a.

41b is a nine-car encoder 41a provided with two pieces.

A part of each code wheel 51a, 51b of 41b protrudes from the - side of the casing 3 on which the electrode plate 11 is disposed, and when the casing 3 is moved along the surface of the wall panel 1, the code wheels 51a, 5 lb comes into contact with the surface of the wall panel 1 and rotates.

Code wheel 51a of both encoders 41a, 41b,
51b are mechanically coupled so that the phase is shifted by 90 degrees, and therefore, as shown in FIGS. 6(a) and 6(b)
As shown in , when moving to the right, the output phase of the first encoder 41m lags behind the output phase of the second encoder 41b (left half), and when moving to the left, the phase relationship is reversed. Yes (right half).

The direction discrimination circuit 42 includes a pair of D7 lip 70 tabs 53m,
53b, and a pair of AND circuits 54a and 54b. Either the output of the first encoder 41a or the output of the second encoder 416 is input to the clock terminal and data terminal of each D7 lip 70 tube 53a, 53b. 7
The connection relationship between the 0-tubes 53a and 53b is reversed. Furthermore, the AND circuits 54a and 54b are configured to obtain the logical product of the input to the clock terminal of each D7 lip 70 knob 53a and 53b and the non-inverted output Q.

Therefore, the outputs of the AND circuits 54a and 54b become pulses as shown in FIGS. 6(c) and 6(d), and when the casing 3 moves to the right, only the first AND circuit 54a When the casing 3 moves to the left by passing the output pulse of the encoder 41a, only the second AND circuit 54b is connected to the second encoder 4.
This allows the output pulse of 1b to pass through.

The counter 43 is a two-digit 7-up down counter 55a, 5
5b, and a digital/analog conversion circuit 56 that converts the output of each 7-up down counter 55m, 55b into an analog signal, and a reset circuit 47 that detects the rising edge of the output of the display circuit 26. is now being reset. The up/down counters 55m and 55b are set so that the rightward movement of the casing 3 is positive, and the output of the first AND circuit 54a is input to the up terminal UP.
Further, the output of the second AND circuit 54b is the down terminal DOW.
It has already been input to N. Therefore, when the casing 3 moves to the right, the output values of the up/down counters 55a and 55b increase, and conversely, when the casing 3 moves to the left, the output values decrease. The output values of the up/down counters 55a, 55b are converted into analog signals by a digital/analog conversion circuit 56 made up of ladder resistors. In addition, in the reset circuit 47, when the output of the display circuit 26 rises and falls,
That is, at the same time as the display lamp 27 lights up, the reset terminal 7F of the 7 count down counter 55a * 55b is connected.
A signal is sent to set the output values of the up/down counters 55m and 55b to zero.

As shown in FIG. 7(,), the up/down counters 55a and 55b gradually increase the output value as shown in FIG. 7(b) when the electrode plate 11 passes near the pillar 2. It is reset by the reset circuit output from the reset circuit 47 at the end of lighting.

The output of the counter 43 is input to the peak detection circuit 44, and since the peak detection circuit 44 stores the maximum value of the output of the counter 43, the up/down counters 55m, 55
The output value immediately before b is reset is the peak detection circuit 44
will be held. The peak detection circuit 44 is provided with a reset switch SW1.
, holds the maximum value until it is closed. The output of the peak detection circuit 44 is divided into two parts by a voltage dividing circuit 45 consisting of a pair of resistors R, , R, and the like.

The output of the counter 43 and the output of the voltage dividing circuit 45 are input to the center display circuit 46, and the center display circuit 46 is connected to a comparison circuit 57 that compares the output value of the voltage dividing circuit 45 and the output voltage of the counter 43. When both inputs of the comparator circuit 57 match, a center indicator lamp 58 made of a light emitting diode is turned on.

With the above configuration, when using this device, the code wheels 51'a and 51 of the encoders 41a and 41b are
Move slowly so that b rotates, as shown in Figure 7 (c).
As shown in the figure, the display lamp 27 is turned off (white circle), then turned on (black circle), and continues moving until it is turned off again. Through this operation, the value corresponding to the width of the support column 2 is held in the peak detection circuit 44.Next, the casing 3 is returned to its original position and moved again with the casing 3 in close contact with the surface of the wall panel 1. When this happens, the center indicator lamp 58 lights up once as shown in FIG. 7(d), indicating the center position of the support column 2.

Note that if an AND circuit is provided between the output terminals of both encoders 41a and 41b and the direction determination circuit 42 to output a logical product with the output value of the display circuit 27, the output level of the display circuit 27 becomes "H". Encoder 41m only during the period when
Conveniently, the output pulse of 41b is input to counter 43.

Incidentally, the casing 3 is provided with marking means, as shown in FIG. The marking means includes an operation button 61 protruding from the surface gA of the casing 3 (indicator lamp side), a return spring 62 that biases the operation button 61 in a direction protruding toward the surface side of the casing 3, and a return spring 62 (on the back surface side of the casing 3). The marker 63 protrudes from the left and right center position of the electrode plate 11 on the electrode plate side), and the marker 63 may be a push pin that makes small scratches on the surface of the wall panel 1 , a device that can write marks on the surface of the wall panel 1, such as a pencil, is used.

(Embodiment 2) In this embodiment, instead of the peak detection circuit 44, voltage dividing circuit 46, and center display circuit 46 of Embodiment 1, the output of the counter 43 is input to a display W648 made of a digital display element such as a liquid crystal display element. are doing. That is, the counter 43 is 3
Consisting of only 7-digit down counters 55a, 55b, and 55e, each 7-up down counter 55m, 55b, and 5
By inputting the outputs of the encoders 5c to the display section 48, the number of pulses output from the encoders 41a and 41b is displayed on the display section 48.
8. Regarding other configurations, with the above configuration, the output pulses of the encoders 41a*41b are counted from the rise of the output of the display circuit 26,
A numerical value corresponding to the moving distance of the casing 3 will be displayed on the display section 48. In this way, the indicator lamp 2
If you read the numerical value on the display section 48 at the position where 7 goes out, then move the casing 3 in the opposite direction to the position where half of the above numerical value is displayed, that position becomes the middle 6 position. It is. In other words, indicator lamp 2
If the value at the time 7 goes out is "11", the casing 3
All you have to do is return it. In addition, encoders 41m, 41
If the relationship between the cycle of the slit 53 of b and the moving distance of the casing 3 (that is, how far the casing 3 moves in one cycle of the output pulses of the encoders 41a*41b) is known, the moving distance and display By calculating the product with the displayed value of the section 48, the width of the support 2 and the distance from the end of the support 2 to the center can be obtained as numerical values. In this device as well, as shown in FIG.
1 protrudes from the surface side of the casing 3, so that a mark can be placed on the surface of the wall panel 1 at the center position.

(Embodiment 3) In this embodiment, as shown in FIG.
By arranging it, it can be used as a marking means. This stapler 64 allows a substantially U-shaped staple 65 to be inserted into the wall panel 1. In other words, the first
As shown in FIG. 2, the staple 6 installed in the stapler 64
5 into the wall panel 1 by pressing the operation part 66 of the stapler 64.

As a simple method of realizing the marking means, the electrode plate 11
As shown in FIG. 13, a recess 67 with a diameter of 8 to 10 mm is provided at one place in the casing 3, or a recess 67 with a diameter of 8 to 10+u+ is provided as shown in FIG. A protrusion 69 having an insertion hole 68 may be formed. To mark the wall panel 1, use these recesses 67 and insertion holes 6.
All you have to do is insert a writing device such as a pencil into 8.

[Effect of the Invention 1] As described above, the present invention provides a support detection device that detects a support provided at the back of a wall panel by placing an electrode plate facing the surface of the wall panel and detecting a change in capacitance.
The device is equipped with a center measuring means for measuring the center position of the pillar, and a display means for displaying that the pillar is located at the center position based on the output value of the center measuring means. This has the advantage of being able to accurately and easily detect the center position of the support provided in the structure.

[Brief explanation of drawings]

11 is a circuit diagram showing the first embodiment of the present invention, and FIG. 2 is a circuit diagram showing the first embodiment of the present invention.
3 is an external perspective view of the same as the above, FIG. 4 is a vertical sectional view of the same as the above, FIG. 5 is a cross sectional view of the same as the above, and FIGS. 6 and 7 are Same operation explanatory diagram, No. 8
Figures (a) and (b) are oblique views of the main parts showing an example of the marking means used in the above, respectively, and a sectional view of the main parts, Fig. 9 is a circuit diagram showing Embodiment 2 of the present invention, and Fig. 10 is the same as the above. FIG. 11 is a perspective view of a main part showing an example of the marking means used in the present invention, FIG. 12 is an explanatory diagram of the same operation, and FIG.
3 and 14 are respectively perspective views showing other marking means used in the present invention, FIG. 15 is a perspective view showing the operating method of the conventional example, and FIG. 16 is an explanatory view of the same operation. , FIG. 18 is a partial perspective view of the same as above. 1 is a wall panel, 2 is a column, 3 is a casing, 11 is an electrode plate, 41a, 41b are encoders, 43 is a counter, 4
4 is a peak detection circuit, 45 is a voltage dividing circuit, and 46 is a center display circuit. Agent Patent Attorney Ishi 1) Ai 7 Figure 8 Figure 8 1 (C)' (b) Umbrella # #J!

Claims (4)

[Claims] (1) In a pillar detection device that detects a pillar provided at the back of a wall panel by placing an electrode plate facing the surface of the wall panel and detecting a change in capacitance, a center measuring means for measuring the center position of the pillar. and display means for displaying that the support is located at the center position based on the output of the center measuring means. (2) The center measuring means consists of an optical encoder that outputs a number of pulses according to the amount of movement on the surface of the wall panel and a counter that counts the output pulses of the encoder, and a width measuring device that measures the width of the support column. It is composed of a center value discrimination circuit that calculates the center position of the support column based on the output value of the measuring device and stores the value, and the display means shows that the center value stored in the center value discrimination circuit matches the output value of the counter. 2. The wall support detection device according to claim 1, further comprising a center indicator lamp that lights up when the sensor is turned on. (3) The center measuring means consists of an optical encoder that outputs a number of pulses according to the amount of movement on the wall panel surface, a counter that counts the output pulses of the encoder, and a width measuring device that measures the width of the support column, and a counter. 2. The wall support detection device according to claim 1, further comprising a digital display type display section that displays the output value of the wall support, and wherein the display means is composed of the display section. (4) The wall support detecting device according to claim 1, further comprising marking means for applying a mark indicating the center position of the support on the surface of the wall panel.